CN109238677B - Laboratory testing method for ball rotor track based on piezoelectric film - Google Patents
Laboratory testing method for ball rotor track based on piezoelectric film Download PDFInfo
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- CN109238677B CN109238677B CN201811103172.6A CN201811103172A CN109238677B CN 109238677 B CN109238677 B CN 109238677B CN 201811103172 A CN201811103172 A CN 201811103172A CN 109238677 B CN109238677 B CN 109238677B
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- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
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Abstract
The invention belongs to the technical field of testing, and relates to a laboratory testing method of a ball rotor track based on a piezoelectric film. The invention aims to provide a laboratory test method for a ball rotor track.
Description
Technical Field
The invention belongs to the technical field of testing, and relates to a laboratory testing method for a ball rotor track based on a piezoelectric film.
Background
In the current ball rotor design, the method for testing the spatial motion trajectory of the ball rotor in a laboratory mainly comprises a trajectory drawing method, a laser marking method and a magnetic field testing method: the trace drawing method is that a painting brush is arranged in a small hole at the upper end of a cavity of a ball rotor, and a pen point is pressed and contacted with the ball rotor; when the ball rotor starts to make positive rotation movement relative to its chamber in a rotating state, the brush draws a track on the surface of the ball rotor. The method has the disadvantages that the contact point of the painting brush and the ball rotor in the experiment must be ensured to be positioned on the rotating shaft of the centrifuge, otherwise the obtained movement track of the ball rotor is distorted, and the misjudgment of the experiment result can be caused if the painting brush is not positioned on the rotating shaft. In addition, the close contact of the paintbrush and the ball rotor increases the friction torque of the ball rotor, and changes the motion condition and state of the ball rotor. The laser marking method is a method for notching the surface of the ball rotor by adopting a laser marking machine to realize laboratory test of the movement track of the ball rotor, can realize the identification of the movement track of the ball rotor under the condition of not introducing external force, and has negligible influence on the quality and the rotational inertia of the ball rotor because the marking line width and the marking depth are very small. The trajectory can basically reflect the movement law of the ball rotor under the ballistic environment condition. However, the laser marking machine has high cost, which restricts the popularization and application of the laser marking machine. The magnetic field test method is to place a magnetic object in the center of the ball rotor and to use the change of the magnetic field when the ball rotor rotates to reversely push the motion track of the ball rotor. The main disadvantage is that the moment of inertia of the ball rotor is greatly changed after the magnetic object is added, and the motion track of the ball rotor is influenced.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a laboratory testing method of a ball rotor track based on a piezoelectric film. The invention is limited by the processing precision of the ball rotor, the contact of the ball rotor and the ball cavity assembly belongs to point contact, and surface contact can not be formed. The ball rotor extrudes the ball cavity assembly when rotating, the ball cavity assembly extrudes the piezoelectric film array to obtain voltage, and the motion trail of the ball rotor is determined by analyzing the change of the specific extrusion position of the piezoelectric film array.
The spatial motion of the laboratory simulated ball rotor is generally achieved by a centrifuge which simulates the high speed rotation of the projectile. The invention is realized by the following scheme:
(1) the invention mainly comprises a base, a shell, a screw, a centrifugal spring, a centrifugal plug, a centrifuge, a piezoelectric film array, an upper shell, a spherical cavity assembly, a power supply and signal processing circuit, a ball rotor, a false detonator, a lower shell and a fixing screw;
(2) designing a base according to a specific interface structure of the centrifuge adopted in a simulation experiment, wherein the base is generally a cylinder and is connected with the centrifuge through threads or other modes;
(3) the shell is made of nylon materials and is fixed with the base through threads;
(4) the screw is a standard screw;
(5) the centrifugal spring is arranged between the centrifuge and the centrifugal plug and forms a safety before the ball rotor is started together with the centrifuge;
(6) the centrifugal plug is arranged behind the centrifugal spring and is in threaded connection with the upper shell;
(7) the centrifugal is placed in the limiting hole of the ball rotor, and the movement of the ball rotor is limited before the resistance of the centrifugal spring is overcome;
(8) the piezoelectric film array is composed of piezoelectric film blocks which are arranged in a spherical shape, and each piezoelectric film block is numbered independently;
(9) the upper shell is made of nylon materials and is fixed with the lower shell through screws;
(10) the ball cavity assembly is made of nylon materials, and molybdenum disulfide is coated inside the ball cavity assembly in order to reduce friction force;
(11) the power supply and signal processing circuit mainly identifies what number of piezoelectric film blocks in the piezoelectric film array generate voltage and the time of generating the voltage;
(12) the ball rotor adopts a standard ball rotor;
(13) the fake detonator is an equivalent substitute with the same mass and the same volume as the real detonator, so that safety accidents are avoided;
(14) the lower shell is made of nylon materials and is connected with the upper shell through screws;
(15) the fixing screw is a standard screw and is used for connecting the shell and the lower shell;
(16) after the test is started, starting the centrifugal machine, when the centrifugal machine reaches a preset rotating speed, overcoming the resistance of a centrifugal spring by a centrifuge rotor under the action of centrifugal force, removing the safety of the ball rotor, starting the rotation of the ball rotor, extruding a ball cavity assembly at a certain point of the ball rotor under the action of the centrifugal force, extruding a piezoelectric film array by the extruded point of the ball cavity assembly, generating voltage by an extruded piezoelectric film block, recording the serial numbers of the extruded piezoelectric film blocks and the time of generating the voltage by a power supply and a signal processing circuit, and recording the serial numbers of all the extruded piezoelectric film blocks and the time of generating the voltage in the rotation process of the ball rotor; and determining the contact position of the ball rotor by analyzing the time and the number of the voltage generated by the piezoelectric film block, and analyzing the motion track of the ball rotor.
In the design of the ball rotor, shooting in a shooting range is an important means for checking the explosion-proof performance and the alignment time of the ball rotor, but the shooting range test increases the checking cost due to high cost and non-repeatability. For the design of the ball rotor, the trial and error shooting range test is not economical, which is also not beneficial to obtain relevant parameters of the ball rotor. The movement process of the ball rotor can be truly reproduced by adopting a simulation test means of a laboratory, the test cost is low, and the method is very favorable for the design and the inspection of the products. Compared with the prior art, the method has the main advantage that the test method basically has no influence on the motion trail of the ball rotor.
Drawings
FIG. 1 is a schematic diagram of a test method.
Fig. 2 is a partially enlarged schematic view of a piezoelectric thin film array.
In the figure: 1. the device comprises a base, 2, a shell, 3, screws, 4, a centrifugal spring, 5, a centrifugal plug, 6, a centrifuge, 7, a piezoelectric film array, 8, an upper shell, 9, a ball cavity assembly, 10, a power supply and signal processing circuit, 11, a ball rotor, 12, a dummy detonator, 13, a lower shell, 14, a fixing screw, 15 and a piezoelectric film block.
Detailed Description
The testing device mainly comprises a base (1), a shell (2), a screw (3), a centrifugal spring (4), a centrifugal plug (5), a centrifuge (6), a piezoelectric film array (7), an upper shell (8), a ball cavity assembly (9), a power supply and signal processing circuit (10), a ball rotor (11), a false detonator (12), a lower shell (13) and a fixing screw (14); the method comprises the following steps that a base (1) is designed according to a specific interface structure of the centrifuge adopted in a simulation experiment, the base (1) is generally a cylinder, and the base (1) is connected with the centrifuge through threads or other modes; the shell (2) is made of nylon materials and is fixed with the base (1) through threads; the screw (3) is a standard screw; the centrifugal spring (4) is arranged between the centrifuge (6) and the centrifugal plug (5) and forms a safety before the ball rotor (11) is started together with the centrifuge (6); the centrifugal plug (5) is placed behind the centrifugal spring (4) and is in threaded connection with the upper shell (8); the centrifuge (6) is arranged in the limiting hole of the ball rotor (11), and the movement of the ball rotor (11) is limited before the resistance of the centrifugal spring (4) is overcome; the piezoelectric film array (7) is composed of piezoelectric film blocks (15) which are arranged in a spherical shape, and each piezoelectric film block (15) is numbered independently; the upper shell (8) is made of nylon materials and is fixed with the lower shell (13) through screws (3); the ball cavity assembly (9) is made of nylon materials, and molybdenum disulfide is coated inside the ball cavity assembly (9) for reducing friction force; the power supply and signal processing circuit (10) mainly completes the identification of the specific number of the piezoelectric film array (7) and the voltage generation time of the piezoelectric film block (15); the ball rotor (11) adopts a standard ball rotor; the fake detonator (12) selects equivalent substitutes with the same mass and the same volume as the real detonator, so that safety accidents are avoided; the lower shell (13) is made of nylon materials and is connected with the upper shell through a screw (3); the fixing screw (14) adopts a standard screw and is used for connecting the shell (2) and the lower shell (13).
Process of action
After the test is started, starting the centrifuge, after the centrifuge reaches a preset rotating speed, overcoming the resistance of a centrifugal spring (4) by a centrifuge (6) under the action of centrifugal force, removing the safety of a ball rotor (11), starting the rotation of the ball rotor (11), extruding a ball cavity assembly (9) at a certain point of the ball rotor (11) under the action of centrifugal force, extruding a piezoelectric film array (7) by the extruded point of the ball cavity assembly (9), generating voltage by an extruded piezoelectric film block (15), recording the numbers of all the extruded piezoelectric film blocks (15) and the time of generating voltage by a power supply and signal processing circuit (10), and recording the numbers of all the extruded piezoelectric film blocks (15) and the time of generating voltage in the rotation process of the ball rotor (11); the contact position of the ball rotor (11) is determined by analyzing the time and the number of the voltage generated by the piezoelectric film block (15), and the motion track of the ball rotor (11) is analyzed.
Mounting means
During installation, firstly a false detonator (12) is installed on a ball rotor (11), then the ball rotor (11) is installed in a ball cavity assembly (9), a piezoelectric film array (7) is installed outside the ball cavity assembly (9), the ball cavity assembly is placed in an upper shell (8) after installation is completed, a centrifuge (6), a centrifugal spring (4), a centrifugal plug (5), a power supply and a signal processing circuit (10) are sequentially installed, and then a lower shell (13), a shell (2) and a base (1) are installed.
Claims (1)
1. A laboratory test method of a ball rotor track based on a piezoelectric film is characterized in that:
(1) the testing device consists of a base, a shell, a screw, a centrifugal spring, a centrifugal plug, a centrifuge, a piezoelectric film array, an upper shell, a spherical cavity assembly, a power supply and signal processing circuit, a spherical rotor, a false detonator, a lower shell and a fixing screw;
(2) designing a base according to a specific interface structure of the centrifuge adopted in a simulation experiment, wherein the base is a cylinder and is connected with the centrifuge through threads or other modes;
(3) the shell is made of nylon materials and is fixed with the base through threads;
(4) the screw is a standard screw;
(5) the centrifugal spring is arranged between the centrifuge and the centrifugal plug and forms a safety before the ball rotor is started together with the centrifuge;
(6) the centrifugal plug is arranged behind the centrifugal spring and is in threaded connection with the upper shell;
(7) the centrifugal is placed in the limiting hole of the ball rotor, and the movement of the ball rotor is limited before the resistance of the centrifugal spring is overcome;
(8) the piezoelectric film array is composed of piezoelectric film blocks which are arranged in a spherical shape, and each piezoelectric film block is numbered independently;
(9) the upper shell is made of nylon materials and is fixed with the lower shell through screws;
(10) the ball cavity assembly is made of nylon materials, and molybdenum disulfide is coated inside the ball cavity assembly in order to reduce friction force;
(11) the power supply and signal processing circuit mainly identifies what number of piezoelectric film blocks in the piezoelectric film array generate voltage and the time of generating the voltage;
(12) the ball rotor adopts a standard ball rotor;
(13) the fake detonator is an equivalent substitute with the same mass and the same volume as the real detonator, so that safety accidents are avoided;
(14) the lower shell is made of nylon materials and is connected with the upper shell through screws;
(15) the fixing screw is a standard screw and is used for connecting the shell and the lower shell;
(16) after the test is started, starting the centrifugal machine, when the centrifugal machine reaches a preset rotating speed, overcoming the resistance of a centrifugal spring by a centrifuge rotor under the action of centrifugal force, removing the safety of the ball rotor, starting the rotation of the ball rotor, extruding a ball cavity assembly at a certain point of the ball rotor under the action of the centrifugal force, extruding a piezoelectric film array by the extruded point of the ball cavity assembly, generating voltage by an extruded piezoelectric film block, recording the serial numbers of the extruded piezoelectric film blocks and the time of generating the voltage by a power supply and a signal processing circuit, and recording the serial numbers of all the extruded piezoelectric film blocks and the time of generating the voltage in the rotation process of the ball rotor; and determining the contact position of the ball rotor by analyzing the time and the number of the voltage generated by the piezoelectric film block, and analyzing the motion track of the ball rotor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811103172.6A CN109238677B (en) | 2018-09-20 | 2018-09-20 | Laboratory testing method for ball rotor track based on piezoelectric film |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811103172.6A CN109238677B (en) | 2018-09-20 | 2018-09-20 | Laboratory testing method for ball rotor track based on piezoelectric film |
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| CN109238677A CN109238677A (en) | 2019-01-18 |
| CN109238677B true CN109238677B (en) | 2020-04-17 |
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| CN201811103172.6A Active CN109238677B (en) | 2018-09-20 | 2018-09-20 | Laboratory testing method for ball rotor track based on piezoelectric film |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1605348A (en) * | 1965-06-30 | 1974-10-31 | ||
| JPH0424531A (en) * | 1990-05-18 | 1992-01-28 | Nippon Thompson Co Ltd | Testing apparatus for centrifugal load bearing |
| JPH06307439A (en) * | 1993-04-19 | 1994-11-01 | Nippon Seiko Kk | Rolling bearing device for electrically driven motor |
| CN102062679A (en) * | 2010-11-11 | 2011-05-18 | 中北大学 | Measurement method of movement locus and inverting time of spherical rotor |
| CN107101541A (en) * | 2017-05-25 | 2017-08-29 | 南京理工大学 | A kind of Moving ball rotor fuse delay arming device |
-
2018
- 2018-09-20 CN CN201811103172.6A patent/CN109238677B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1605348A (en) * | 1965-06-30 | 1974-10-31 | ||
| JPH0424531A (en) * | 1990-05-18 | 1992-01-28 | Nippon Thompson Co Ltd | Testing apparatus for centrifugal load bearing |
| JPH06307439A (en) * | 1993-04-19 | 1994-11-01 | Nippon Seiko Kk | Rolling bearing device for electrically driven motor |
| CN102062679A (en) * | 2010-11-11 | 2011-05-18 | 中北大学 | Measurement method of movement locus and inverting time of spherical rotor |
| CN107101541A (en) * | 2017-05-25 | 2017-08-29 | 南京理工大学 | A kind of Moving ball rotor fuse delay arming device |
Non-Patent Citations (1)
| Title |
|---|
| 基于场强变化的球转子运动规律测试方法;秦栋泽;《中北大学学报（自然科学版）》;20120831;第33卷(第4期);第412-415页 * |
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Effective date of registration: 20210125 Address after: A215-13, 2 / F, block a, R & D office building, collaborative innovation port, Hongguang Avenue, Fengdong new town, Xi'an City, Shaanxi Province, 710116 Patentee after: Shaanxi luogaiyinshi Information Technology Co.,Ltd. Address before: 030051 No. 3, Xueyuan Road, Shanxi, Taiyuan Patentee before: NORTH University OF CHINA |